{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["biomedical", "machine or equipment", "material", "concept or principle", "enabling technology", "engineering feature"], "input": "The heat exchanger was tested using nitrogen ( N2 ) on the hot-side and air on the cold-side as the working fluids ."}
{"biomedical": [], "machine or equipment": ["heat exchanger"], "material": ["as", "nitrogen", "N2", "fluids"], "concept or principle": [], "enabling technology": [], "engineering feature": []}